1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Studentka2010 [4]
3 years ago
5

calculate the efficiency of a light bulb that had an input of 400 j transfers 100j as a light and 300j as heat.​

Physics
1 answer:
beks73 [17]3 years ago
6 0
Efficiency = useful energy out / total energy in x 100
= 100/400 x 100
=0.25 x 100
= 25%

25%
You might be interested in
Which item is not considered electromagnetic energy?
suter [353]
Sound waves are known to be the one that's not considered as a type of electromagnetic energy. As for microwaves and x-rays, they tend to share the same frequencies that can be considered as electromagnetic, and sound waves have a different frequency than them.
5 0
3 years ago
Activity
vodka [1.7K]
Your welcome LOL plz like

5 0
3 years ago
What happens to the speed of light as it passes into a glass block?
Deffense [45]
<h3>♫ - - - - - - - - - - - - - - - ~<u>Hello There</u>!~ - - - - - - - - - - - - - - - ♫</h3>

➷ The speed would reduce as glass is denser than air.

<h3><u>✽</u></h3>

➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

↬ ʜᴀɴɴᴀʜ ♡

7 0
3 years ago
Read 2 more answers
What is the gravitational potential energy of a 65.7 kg person standing on the roof of a 135 meter building?
horrorfan [7]
For the purpose we will use the following equation for potential energy:
U = m * g * h
In the above equation, m represents the mass of the object, h represents the height of the object and g represents the gravitational field strength (9.8 N/kg on Earth).
When we plug values into the equation, we get following:
U= 65.7kg * 9.8 N/kg *135m = 86921.1 J = 86.92 kJ

8 0
3 years ago
What is f =ma derivation?<br>​
Veronika [31]

Derive relation F = ma from Newton 2nd Law of Motion. Let us derive the relation of force F = ma from Newton's second law: ... It means that the linear momentum will change faster when a bigger force is applied. Consider a body of mass 'm' moving with velocity v.

8 0
3 years ago
Read 2 more answers
Other questions:
  • An 80kg student running at 3.50m/s grabs a rope that is hanging vertically. How high will the student swing?
    9·1 answer
  • In which labeled portion of the curve would you use the heat of vaporization to calculate the heat absorbed? (image attached ins
    8·1 answer
  • Consider the classic problem with holiday lights, one little bulb goes out and the whole string goes out. First consider a strin
    9·1 answer
  • An airplane black box contains a bunch of unknown resistances and batteries con- nected in unknown way such that (1) a 9 Ohm res
    13·1 answer
  • The atomic mass is important because?
    14·1 answer
  • A golfer gives a ball a maximum initial speed of 51.5 m/s. how far does it go
    10·1 answer
  • How are cheek and skin cells different?
    7·1 answer
  • A ball is pushed into a spring-loaded launcher with a force of 20 N, which compresses the spring 0.08 m.
    15·1 answer
  • A 10248 kg car is pulled by a low tow truck that has an acceleration of 2.0m/s what is the net force on the car
    15·1 answer
  • when you hold a spherical concave mirror with a 48.2-cm radius of curvature in front of your face, you see an image of your face
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!